382 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



We collected all the bolls we could find containing Heliothids. At that time, Sep- 

 tember 23, they were scarce. These, with nnmbers of Aletiae, we showered with a 

 wood-spirit extract of Pyrethrum diluted with water at the rate of thirty to one. The 

 Aletiae fell off the leaves and died in less than ten minutes. In about that time the 

 Heliothids backed out of their holes and crawled about uneasily. In five minutes th©y, 

 too, fell to the ground. 



Doubtless it is by creating in this way an atmosphere deadly to them they were 

 forced to leave their retreats and get upon the wet and fatal leaves. When fields can 

 be sprinkled instead of only a few feet, probably a still weaker infusion will prove 

 effectual. With this extract, then, it becomes only a question of cost to deal with the 

 Boll Worm. 



For a fall discussion of Pyrethrum, its cultivation and its compounds, 

 see Chapter X. 



BIBLIOGRAPHY. 



In this list we include simply the titles of those articles consulted in 

 the preparation of this short account of the Boll Worm. It will, how- 

 ever, be found to contain all the more important articles which have 

 been written on the subject in this country. 



American Entomologist.— ''The Tomato Fruit Worm." Yol. ii, p. 172. 



[An acconnt of ftm exhl¥itieii before the London Entomological Society of Heliothis reared 



from tomatoes by J. Jenner Weir.] 



Anon.— Southern Planter. 1842. 



[Advises rotation of com with cotton as a remedy for the Boll Werm.] 

 Boddie, J. W.— American Cotton Planter. July (?), 1850. 



[Deecribes the moth BcicBtifically aa Phmlena zea, and states that the first brood is to be 

 found on com and the second on cotton. Also describes the eggs of what is evidently a Tach- 

 inid on the larva. Advises as a remedy to plant no com.] 

 Eeimpr. — Turner's Cotton Planter's Manual. N. Y., 1857. 



Boisdural, J. B. A. D. — Genera et Index Methodicus Europeomm Lepidopterum. 



Paris, 1840, p. 1308. 



Bond, "W. J. (?)— Proc. Lond. Ent. Soc. March 1, 1869. 



[Exhibited specimens otH. armigera from different parte of the irorld.] 

 Brow^n, D. J. — -'Investigations of the Insects and Diseases affecting the Cotton 

 Plant." Department of Agriculture Report, 1857, p. 121. 



[In the course of this article, which -was published over G-lover's name, but disowned by 

 him in his 1878 MS. Xotes, Cotton, a short account of the Com Worm is jiven on p. 123.] 



Claypole, E. W. — '-Heliothis armigera Feeding on hard Corn." American Ento- 

 mologist, iii, 278, Xov., 1880. 

 Comstock, J. H.— " The Boll Worm." Report on Cotton Insect*, Washington, 1879, 

 pp. 287-315. 

 The same condensed in Ann. Rept. Dept. Agr., 1879, pp. 33"2-347. 



[FuU aceeant, givincr results of iareetifatienB made uBder direetiom of C. T. Siley in 1878.] 

 Duponchel.— Histoire Naturelle d. L^pidopt^res de France, iv, p. 316, pi. 119, figs. 5, 6. 



Fallon, M. J. — Insectologie Agricole, 1869, p. 205. 



[HeliGttiis tvnnigtrtk reeorded as feeding on Chick Pea.] 

 French, Q. H. — " Corn Worm or Boll Worm." Seventh Illinois State Entomological 



Report, p. 102. 1877. 

 French, G. H.— Ibid, pp. 231-233. 



French, G. H.— "Corn Worm." Prairie Farmer, October 26, 1878. 

 [Experiments with freezing the pupae.] 



